Aldisa albatrossae | |
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Aldisa albatrossae off the Bonin Islands, Japan. | |
Scientific classification | |
Kingdom: | |
Phylum: | |
Class: | |
(unranked): | clade Heterobranchia clade Euthyneura clade Nudipleura clade Nudibranchia clade Euctenidiacea clade Doridacea |
Superfamily: | |
Family: | |
Genus: | |
Species: | A. albatrossae |
Binomial name | |
Aldisa albatrossae Elwood, Valdés & Gossliner, 2000 [1] | |
Aldisa albatrossae is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Cadlinidae. [2]
In biology, a species ( ) is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. While these definitions may seem adequate, when looked at more closely they represent problematic species concepts. For example, the boundaries between closely related species become unclear with hybridisation, in a species complex of hundreds of similar microspecies, and in a ring species. Also, among organisms that reproduce only asexually, the concept of a reproductive species breaks down, and each clone is potentially a microspecies.
Sea slug is a common name for some marine invertebrates with varying levels of resemblance to terrestrial slugs. Most creatures known as sea slugs are actually gastropods, i.e. they are sea snails that over evolutionary time have either completely lost their shells, or have seemingly lost their shells due to having a greatly reduced or internal shell. The name "sea slug" is most often applied to nudibranchs, as well as to a paraphyletic set of other marine gastropods without obvious shells.
Doridoidea, commonly known as dorid nudibranchs, are a taxonomic superfamily of medium to large, shell-less sea slugs, marine gastropod mollusks in the clade Doridacea, included in the clade Nudibranchia.
Described from Seragaki, Okinawa, Japan, this demersal nudibranch has a wide distribution in the tropical Pacific region. It has been found at depths between 3 and 72 m., in diverse places: Okinawa, the Philippines and North Sulawesi. [3]
The demersal zone is the part of the sea or ocean consisting of the part of the water column near to the seabed and the benthos. The demersal zone is just above the benthic zone and forms a layer of the larger profundal zone.
The Philippines, officially the Republic of the Philippines, is an archipelagic country in Southeast Asia. Situated in the western Pacific Ocean, it consists of about 7,641 islands that are categorized broadly under three main geographical divisions from north to south: Luzon, Visayas, and Mindanao. The capital city of the Philippines is Manila and the most populous city is Quezon City, both part of Metro Manila. Bounded by the South China Sea on the west, the Philippine Sea on the east and the Celebes Sea on the southwest, the Philippines shares maritime borders with Taiwan to the north, Vietnam to the west, Palau to the east, and Malaysia and Indonesia to the south.
Sulawesi, formerly known as Celebes, is an island in Indonesia. One of the four Greater Sunda Islands, and the world's eleventh-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu Archipelago. Within Indonesia, only Sumatra, Borneo and Papua are larger in territory, and only Java and Sumatra have larger populations.
Aldisa albatrossae is a rather small nudibranch, with a length between 11 and 22 mm. The bluish gray dorsum is covered with many white, round tubercles. Typically there is a black line which starts in front of the rhinophores, and continues in a rectangular shape to the gills at the back. This black line then encompasses the gills. There are also yellow-orange markings on the corners of the rectangle. The lamellate rhinophores have a translucent, dirty-white color. The bipinnate gills only have a few branches, and have the same dirty white color. [4] [5] It is believed to mimic species of Phyllidiella and shares this characteristic with some other species of Aldisa such as Aldisa williamsi , Aldisa erwinkoehleri and unrelated dorid nudibranchs such as Paradoris liturata . [1] [6]
In anatomy, a tubercle is any round nodule, small eminence, or warty outgrowth found on external or internal organs of a plant or an animal.
A rhinophore is one of a pair of chemosensory club-shaped, rod-shaped or ear-like structures which are the most prominent part of the external head anatomy in sea slugs, marine gastropod opisthobranch mollusks such as the nudibranchs (Nudibranchia), Sea Hares, (Aplysiomorpha) and sap-sucking sea slugs (Sacoglossa).
A gill is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water and excretes carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are kept moist. The microscopic structure of a gill presents a large surface area to the external environment. Branchia is the zoologists' name for gills.
Aldisa is a genus of sea slugs, dorid nudibranchs, marine gastropod molluscs in the family Cadlinidae.
Hypselodoris tryoni is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Chromodoris elisabethina is a species of very colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Hypselodoris purpureomaculosa is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Phyllidia babai is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.
The three-spot nudibranch, scientific name Aldisa trimaculata, is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Cadlinidae.
Goniobranchus roboi, common name the tooth-edged chromodoris, is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae. This species was transferred from Chromodoris to Goniobranchus in 2012.
Goniobranchus tumuliferus is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Goniobranchus sinensis is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Hypselodoris maridadilus is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae. It feeds on sponges.
Hypselodoris nigrostriata is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Hypselodoris babai is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Hypselodoris maculosa is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Hypselodoris maritima is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Hypselodoris nigrolineata is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Hypselodoris regina is a conspicuous species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Mexichromis pusilla is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Mexichromis similaris is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Aldisa williamsi is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Cadlinidae.
Hypselodoris cerisae is a species of sea slug or dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
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